setup.py

'''
Function:
    Implementation of SETUP for SSSegmentation
Author:
    Zhenchao Jin
'''
import os
import re
import sys
import ssseg
from setuptools import setup, find_packages
try:
    from torch.utils.cpp_extension import BuildExtension, CUDAExtension
except ImportError as err:
    print('WARNING: BuildExtension, CUDAExtension could not be imported, please install `torch` and `torchvision` if you want to setup with `ext_modules`')
    BuildExtension, CUDAExtension = None, None


'''SSSEG_WITH_OPS'''
SSSEG_WITH_OPS = os.getenv('SSSEG_WITH_OPS', '0') == '1'
if BuildExtension is None: assert not SSSEG_WITH_OPS


'''readme'''
with open('README.md', 'r', encoding='utf-8') as f:
    long_description = f.read()


'''parserequirements'''
def parserequirements(fname='requirements.txt', with_version=True):
    require_fpath = fname
    '''parseline'''
    def parseline(line):
        if line.startswith('-r '):
            target = line.split(' ')[1]
            for info in parserequirefile(target):
                yield info
        else:
            info = {'line': line}
            if line.startswith('-e '):
                info['package'] = line.split('#egg=')[1]
            elif '@git+' in line:
                info['package'] = line
            else:
                pat = '(' + '|'.join(['>=', '==', '>']) + ')'
                parts = re.split(pat, line, maxsplit=1)
                parts = [p.strip() for p in parts]
                info['package'] = parts[0]
                if len(parts) > 1:
                    op, rest = parts[1:]
                    if ';' in rest:
                        version, platform_deps = map(str.strip, rest.split(';'))
                        info['platform_deps'] = platform_deps
                    else:
                        version = rest
                    info['version'] = (op, version)
            yield info
    '''parserequirefile'''
    def parserequirefile(fpath):
        with open(fpath, 'r') as f:
            for line in f.readlines():
                line = line.strip()
                if line and not line.startswith('#'):
                    for info in parseline(line):
                        yield info
    '''genpackagesitems'''
    def genpackagesitems():
        if os.path.exists(require_fpath):
            for info in parserequirefile(require_fpath):
                parts = [info['package']]
                if with_version and 'version' in info:
                    parts.extend(info['version'])
                if not sys.version.startswith('3.4'):
                    platform_deps = info.get('platform_deps')
                    if platform_deps is not None:
                        parts.append(';' + platform_deps)
                item = ''.join(parts)
                yield item
    # parse and return
    packages = list(genpackagesitems())
    if 'chainercv' in packages:
        try:
            import numpy as np
        except:
            raise ImportError('To install ssseg with chainercv, numpy with version being lower than 2.0.0 should be installed, e.g., pip install numpy==1.26.4')
        assert np.__version__ < '2.0.0', 'numpy version should be lower than 2.0.0 if you want to utilize chainercv, e.g., pip install numpy==1.26.4'
    return packages


'''getextensions'''
def getextensions():
    ext_modules = []
    if SSSEG_WITH_OPS:
        srcs = ["ssseg/extensions/samv2/connected_components.cu"]
        compile_args = {
            'cxx': [], 'nvcc': ['-DCUDA_HAS_FP16=1', '-D__CUDA_NO_HALF_OPERATORS__', '-D__CUDA_NO_HALF_CONVERSIONS__', '-D__CUDA_NO_HALF2_OPERATORS__'],
        }
        ext_modules.append(CUDAExtension('ssseg.extensions.samv2._C', srcs, extra_compile_args=compile_args))
    return ext_modules


'''setup'''
setup(
    name=ssseg.__title__,
    version=ssseg.__version__,
    description=ssseg.__description__,
    long_description=long_description,
    long_description_content_type='text/markdown',
    keywords='semantic segmentation',
    classifiers=[
        'License :: OSI Approved :: Apache Software License',
        'Programming Language :: Python :: 3',
        'Intended Audience :: Developers',
        'Operating System :: OS Independent',
        'Topic :: Utilities',
    ],
    author=ssseg.__author__,
    url=ssseg.__url__,
    author_email=ssseg.__email__,
    license=ssseg.__license__,
    include_package_data=True,
    install_requires=parserequirements('requirements.txt'),
    zip_safe=False,
    python_requires='>=3.7',
    ext_modules=getextensions(),
    packages=find_packages(),
    cmdclass={"build_ext": BuildExtension.with_options(no_python_abi_suffix=True)} if BuildExtension is not None else {},
)